• The author presents the Book of Allah as the foremost of the Shariah proofs named in the introduction.
• Its revealed wording is preserved in the Mushaf and transmitted as Quran through Tawatur. It is therefore a reliable basis for understanding Shariah rulings.
• Usul al-Fiqh then studies what those words mean and how they point to a ruling. This way of pointing to a meaning is later called indication (Dalalah).
First establish the source; then study what its wording conveys.